The **SD20-2R2-R** is a high-performance, low-profile power inductor manufactured by **Eaton (formerly Cooper Bussmann)**. It belongs to the SD20 series, which is designed for high power density and efficiency in compact electronic circuits. --- ### 1. Technical Specifications The part number follows a specific nomenclature. Here are the primary technical parameters for the `SD20-2R2-R`: | Parameter | Value | | :--- | :--- | | **Inductance** | 2.2 µH | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | 0.0461 Ω (Typical) | | **Saturation Current ($I_{sat}$)** | 2.05 A | | **RMS Current ($I_{rms}$)** | 1.86 A | | **Operating Temperature** | -40°C to +125°C | | **Dimensions** | 5.2 x 5.2 x 2.0 mm | | **Shielding** | Magnetically Shielded | --- ### 2. Key Features * **Magnetically Shielded:** The component is enclosed in a ferrite core structure. This minimizes Electromagnetic Interference (EMI), making it suitable for densely packed circuit boards near sensitive components. * **Low Profile:** With a height of only 2.0 mm, it is ideal for thin portable devices. * **Ferrite Core Material:** Provides high efficiency and low core losses at high switching frequencies. * **RoHS Compliant:** The "-R" suffix indicates that the part is lead-free and meets RoHS environmental standards. --- ### 3. Common Applications Due to its balance of size and current handling, the SD20-2R2-R is commonly found in: 1. **DC-DC Converters:** Used as a storage element in buck, boost, or SEPIC converters. 2. **Portable Electronics:** Smartphones, tablets, and handheld gaming consoles. 3. **Computer Peripherals:** SSDs, network cards, and low-voltage power rails on motherboards. 4. **LED Drivers:** Providing stable current for lighting applications. --- ### 4. Part Number Breakdown The part number can be decoded as follows: * **SD:** Series name (Shielded Drum Core). * **20:** Size code (refers to the 2.0mm height). * **2R2:** Inductance value (2.2 microhenries). * **-R:** RoHS compliant.